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Recursos minerais e combustíveis

Authors: Cabrita, Isabel; Baeta, António; Gulyurtlu, Ibrahim;

Recursos minerais e combustíveis

Abstract

Portugal, sendo um país que se diz pobre em recursos minerais e combustíveis fósseis, caracteriza-se pela sua diversidade em termos de recursos endógenos, como se demonstra na figura com o título Distribuição Geográfica Das Principais Minas de Extracção de Minérios E Respectiva Produção, Em Toneladas No Ano De 1994. As trocas comerciais a nível dos diferentes tipos de minérios sintetizam-se no quadro Dados Sobre Importações E Exportações De Minérios. Portugal é rico em minérios não metálicos, os quais se concentram nas regiões Norte e Centro do país, tendo ainda minas de cobre, ferro-manganês, estanho e titânio e sal-gema na região sul. Exploram-se ainda rochas para fins ornamentais e industriais, tendo-se extraído cerca de 62 milhões de toneladas, em 1994. Neste grupo inclui-se a areia e a argila que existem praticamente por todo o país. Isto demonstra a riqueza nacional neste tipo de matéria-prirna, com a vantagem de ser produtor de argila branca.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green